Brush for cleaning castings



(No Model.)

J. HQDA VISJ" Brush for Cleaning Castings.

N0.- 232,600. Patented Sept. 28,1880.

mvzmon ATTORNEY .FETERS, FnoTo-LWHcQRAPHER WASHINGTDN n c UNITED STATES PATENT ()FFICE,

JOSEPH H. DAVIS, OF SE WIOKLEY, PENNSYLVANIA.

BRUSH FOR CLEANING CA STINGS.

SPECIFICATION forming part of Letters Patent No. 232,600, dated September 28, 1880. Application filed April 13, 1880. (No model.)

To all whom it may concern Be it known that I, JOsEPH H. DAVIS, of Sewickley, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brushes for Cleaning Castings; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompan ying drawings, and to the letters of reference marked thereon.

To enable others skilled in the art with which my invention is most nearly connected to make and use it, I will proceed to describe its construction and operation.

In the accompanying drawings, which form part of my specification, Figure l is a perspective view of my improvement in brushes for cleaning castings. Fig. 2 is a top viewor plan of the same, representingtheback-board removed. Fig. 3 is a perspective view of the back-board. Fig. 4 is a perspective View of a single bristle used in the construction of my improved brush for cleanin g castings.

My invention relates to an improved construction of the brushes now in general use for cleaning castings, the form of which brush long experience has demonstrated to be the best and most desirable shape, but at the same time has the disadvantage of becoming impaired by the splitting and the separation of the backboard from the other part of the brush, and also destroying in part the spring of the steel bristles.

Now, the object of my improvement is the retaining of the usual form of the brush, and at the same time making it stronger and more durable, and gaining increased length and spring of the bristles without increase of the stock or additional cost in the construction of said brush.

In constructing brushes for cleaning castings, the old and well-known method consists in securing the steel bristles A in a block of wood, B, furnished with openings 0 for the bristles, which are held in said openings by means ot'a wire, D, passing through the arch c of the bristles, as indicated in Fig.- 2. This block B is usually about one inch in thickness, and upon it is tacked another block of wood, G, about one-fourth of an inch in thickness, for the purpose of holding the bristles A in position in the openings 0.

In the use of the brush in cleaning the sand from castings, the operator employs a pounding and sweeping motion, and the pounding action on the lower end of the bristles A splits and detaches the block 0 from the block B,

which allows the bristles to become displaced,

thereby rendering the brush useless. The thick block takes unnecessarily from the length of the bristles A at least'one-half of an inch, and also impairs the spring of the bristles by the depth of wood that extends below the chord g of the arch e of the bristles A. Now, to secure i ncreased length and springin the bristles, and without the addition of metal in them, and for securing them safely in position withoutliabiiity of displacement by splitting or separation of the block (J from the block B, I place the bristles A in a thin block, B, and fasten a thick block, 0, upon the thin block B with nails passing through both blocks, and clinching said nails, which improved construction of the brush is shown in Fig. 11. In all other respects my improved brush is constructed in the usual manner.

Having thus described my improvement, what I claim as of my invention is- In a brush for cleaning castings, the bristles A,'secured in a thin block, B, and a thick block, 0, secured on it, substantially as herein described, and for the purpose set forth JOS. H. DAVIS.

Witnesses:

A. G. JOHNSTON, J. J. JOHNSTON. 

